Just as the Green Bay Packers got their Pro Bowl wide receiver back at practice Thursday, they reportedly learned they lost one of their up-and-coming wideouts to injury for an unknown amount of time.

According to ESPN, Allen Lazard underwent surgery to repair a core muscle injury this week and is sidelined indefinitely.

Lazard, 24, had six catches for 146 yards, both career bests, and a touchdown in Green Bay’s 37-30 victory at New Orleans on Sunday night. His big game occurred in the absence of Packers star Davante Adams, who was out due to a hamstring injury.

Lazard, who has 13 receptions this year, leads the Packers in receiving yards (254) while his two touchdown catches are tied with Adams and tight end Robert Tonyan for top honors on the club.

Lazard has 49 receptions for 738 yards and five touchdowns in 20 career games (six starts) with the Packers.

As for Adams, he admitted on Thursday that he was “feeling a lot better this week than last week.” He added that he is going to “make sure I’m 100 percent before I’m back out there.”

The Packers (3-0) won’t have to make that decision officially until Monday, when they host the Atlanta Falcons (0-3). Marquez Valdes-Scantling would see an uptick in snaps if Adams can’t play.

Adams has recorded 17 receptions for 192 receiving yards this season. The three-time Pro Bowl selection has 448 receptions for 5,386 yards and 46 scores in his six-plus seasons with Green Bay.

Tight end Josiah Deguara (ankle), linebacker Christian Kirksey (pectoral) and tight end Marcedes Lewis (knee) did not practice on Thursday. Kirksey is in jeopardy of missing multiple games.

Defensive lineman Kenny Clark (groin), and linebackers Rashan Gary (ankle), Randy Ramsey (groin) and Za’Darius Smith (ankle) were limited participants.